1 Samuel 14:32-35

32So they rushed greedily to the plunder, taking sheep, cattle, and calves. They slaughtered them on the ground and ate meat with the blood still in it.

33Then someone reported to Saul: “Look, the troops are sinning against the LORD by eating meat with the blood still in it.”

“You have broken faith,” said Saul. “Roll a large stone over here at once.” 34Then he said, “Go among the troops and tell them, ‘Each man must bring me his ox or his sheep, slaughter them in this place, and then eat. Do not sin against the LORD by eating meat with the blood still in it.’”

So that night everyone brought his ox and slaughtered it there. 35Then Saul built an altar to the LORD; it was the first time he had built an altar to the LORD.